Emotional strain (7)
I believe the answer is:
tension
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">emotional strain</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for tension that I've seen before include "Conflict" , "anxious state" , "State of strain or suspense" , "A pulling strain" , "Strained condition" .)